JP2001252574A - Catalyst structure for cleaning exhaust gas and reticulated material used for this - Google Patents
Catalyst structure for cleaning exhaust gas and reticulated material used for thisInfo
- Publication number
- JP2001252574A JP2001252574A JP2000069010A JP2000069010A JP2001252574A JP 2001252574 A JP2001252574 A JP 2001252574A JP 2000069010 A JP2000069010 A JP 2000069010A JP 2000069010 A JP2000069010 A JP 2000069010A JP 2001252574 A JP2001252574 A JP 2001252574A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- catalyst
- metal lath
- mesh
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 129
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000004140 cleaning Methods 0.000 title abstract 2
- 229910052751 metal Inorganic materials 0.000 claims abstract description 123
- 239000002184 metal Substances 0.000 claims abstract description 123
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 claims abstract description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 5
- 239000002759 woven fabric Substances 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 39
- 238000009825 accumulation Methods 0.000 abstract description 14
- 238000006555 catalytic reaction Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 22
- 239000002245 particle Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000012784 inorganic fiber Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 2
- 229940010552 ammonium molybdate Drugs 0.000 description 2
- 235000018660 ammonium molybdate Nutrition 0.000 description 2
- 239000011609 ammonium molybdate Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 101000650817 Homo sapiens Semaphorin-4D Proteins 0.000 description 1
- 102100027744 Semaphorin-4D Human genes 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排ガス浄化用触媒
構造体およびこれに用いる網状物に係り、特にダストの
堆積および閉塞を防止することができる排ガス浄化用触
媒構造体およびこれに用いる網状物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying catalyst structure and a mesh used therefor, and more particularly to an exhaust gas purifying catalyst structure capable of preventing accumulation and blockage of dust and a mesh used therefor. About.
【０００２】[0002]
【従来の技術】発電所等から排出される排煙中の窒素酸
化物（ＮＯｘ）は、酸性雨などの原因物質である。排ガ
ス中のＮＯｘの効果的な除去方法としては、例えばＮＨ
3 を還元剤として選択的接触還元する排煙脱硝方法が知
られており、火力発電所を中心に幅広く採用されてい
る。脱硝触媒は通常ハニカム状、板状に成形され、各種
製造方法が提案されている。中でも、金属薄板をメタル
ラス加工したのち、アルミニウムを溶射したものまたは
セラミックス繊維製織布若しくは不織布を基板とし、こ
れに触媒成分を塗布、圧着した板状触媒を波形のエレメ
ント状に加工したものが知られている。そして、このエ
レメントを多数積層した触媒構造体（特開昭５４−７９
１８８号、特開昭５９−７３０５３号等）は、通風損失
が小さく、ばい塵や石炭の燃焼灰等で閉塞されにくい等
の優れた特長がある。このような脱硝触媒は、現在、火
力発電所のボイラ排ガスを処理する脱硝装置に多用され
ている。2. Description of the Related Art Nitrogen oxides (NOx) in flue gas discharged from power plants and the like are substances that cause acid rain and the like. As an effective method for removing NOx in exhaust gas, for example, NH 4
There is known a flue gas denitration method in which selective catalytic reduction is performed using 3 as a reducing agent, and it is widely used mainly in thermal power plants. The denitration catalyst is usually formed into a honeycomb shape or a plate shape, and various production methods have been proposed. Of these, a metal sheet is processed into a metal lath, and then a sprayed aluminum or ceramic fiber woven or nonwoven substrate is used as a substrate, and a catalyst component is applied to the substrate and pressed to form a corrugated element into a corrugated element. Have been. A catalyst structure in which a number of these elements are stacked (Japanese Patent Laid-Open No. 54-79)
188, JP-A-59-73053, etc.) have excellent features such as low ventilation loss and are hardly clogged by dust and coal combustion ash. At present, such a denitration catalyst is frequently used in a denitration apparatus for treating boiler exhaust gas of a thermal power plant.
【０００３】ところで、近年、排ガス脱硝装置の高性能
化を図るため、多くの分野で触媒の板厚を薄くして原料
費や通風損失を低減しようとする努力がなされている。
また、従来、触媒間ピッチの大きい触媒を低ガス流速条
件で使用していた石炭焚きボイラ排ガスの脱硝分野にお
いても、ガス流速を高めると同時に触媒ピッチを小さく
したコンパクトな脱硝装置の需要が高まっている。In recent years, efforts have been made in many fields to reduce the thickness of catalysts to reduce raw material costs and ventilation losses in order to improve the performance of exhaust gas denitration equipment.
In the field of denitrification of flue gas from coal-fired boilers, which used to use catalysts with a large pitch between catalysts at low gas flow rates, the demand for compact denitration equipment that increased the gas flow rate and reduced the catalyst pitch was also increasing. I have.
【０００４】このような近年の動向にマッチしたものと
して、例えば本発明者の未公知の、階段状または波板状
に成形した触媒体と、平板状織布または表裏を貫通する
孔を多数有する金属製網状物、例えばメタルラス板等を
交互に積層した触媒構造体が挙げられる。この触媒構造
体は、ガス流れが網状物の目開き部を通って乱されるこ
とにより、処理ガスと触媒との接触が促進されるので、
反応速度が飛躍的に向上して高い触媒性能が得られると
いう特長がある。またこの触媒構造体には製造工程を簡
素化できるという特長がある。In order to match such a recent trend, for example, a catalyst body formed in a stepped or corrugated shape, which is unknown to the present inventor, and a large number of holes penetrating through a flat woven fabric or front and back surfaces. A catalyst structure in which metal nets, for example, metal lath plates or the like, are alternately laminated is exemplified. This catalyst structure promotes the contact between the processing gas and the catalyst by disturbing the gas flow through the openings of the mesh,
It has the feature that the reaction rate is dramatically improved and high catalyst performance is obtained. Further, this catalyst structure has a feature that the manufacturing process can be simplified.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記先
行技術で使用される網状物としてのメタルラス板は、例
えば図１０に平面図およびＡ−Ａ線矢視方向断面図とし
て示したような構造をしており、目開き部を形成する金
属部分がガス流れに対して大きな方向性を有していた。
このため、高濃度のダストを含む排ガスを処理する触媒
構造体の部材として用いた場合、図１１に示したよう
に、ダスト粒子６の大部分がメタルラス板２に対して一
方向の流れとなり（ａ）、逆方向からのダスト粒子がメ
タルラス板２の目開き部周辺に付着し易い（ｂ）という
問題があった。また、このような傾向はメタルラス板の
板厚が厚く、排ガス５の流れ方向とメタルラス板の金属
部とがなす角度が大きい程強く、図１２に示したよう
に、一旦目開き部に堆積したダスト４は脱落し難く、目
開き部が閉塞され易いという問題があった。However, the metal lath plate as a mesh used in the above-mentioned prior art has a structure as shown in FIG. 10 as a plan view and a sectional view taken along line AA. Thus, the metal part forming the mesh had a large directionality with respect to the gas flow.
Therefore, when used as a member of a catalyst structure for treating exhaust gas containing high-concentration dust, most of the dust particles 6 flow in one direction with respect to the metal lath plate 2 as shown in FIG. a), there is a problem that dust particles from the opposite direction tend to adhere around the openings of the metal lath plate 2 (b). Further, such a tendency is stronger as the thickness of the metal lath plate is thicker and the angle between the flow direction of the exhaust gas 5 and the metal portion of the metal lath plate is larger. As shown in FIG. There is a problem that the dust 4 is hard to fall off and the openings are easily closed.
【０００６】[0006]
【課題を解決するための手段】本発明の課題は、上記先
行技術の問題点を解決し、ダスト濃度の高い排ガスに適
用してもダストの堆積および閉塞を防止して長期間安定
な触媒反応を継続することができる排ガス処理用触媒構
造体およびこれに用いる網状物を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to prevent the accumulation and clogging of dust even when applied to exhaust gas having a high dust concentration, thereby stabilizing the catalytic reaction for a long period of time. It is an object of the present invention to provide an exhaust gas treatment catalyst structure capable of continuing the above-mentioned process and a mesh material used for the same.
【０００７】上記課題を解決するため、本願で特許請求
する発明は以下のとおりである。 （１）平板状の触媒を交互に逆方向に折り曲げて階段状
または波板状に成形した板状触媒を、平板状の網状物を
介して多数積層した触媒構造体において、前記網状物と
してメタルラス板を用い、該メタルラス板の板厚を、メ
タルラス加工前の金属板の板厚の１．２〜３倍としたこ
とを特徴とする排ガス浄化用触媒構造体。[0007] The invention claimed in this application to solve the above problems is as follows. (1) In a catalyst structure in which a large number of plate-like catalysts formed by alternately bending plate-like catalysts in the opposite direction to form a stepped or corrugated shape are laminated via a plate-like mesh, A catalyst structure for purifying exhaust gas, wherein a metal plate is used, and the thickness of the metal lath plate is 1.2 to 3 times the thickness of the metal plate before metal lath processing.
【０００８】（２）平板状の板状触媒を、交互に逆方向
に折り曲げて階段状または波板状に成形した網状物を介
して多数積層した触媒構造体において、前記網状物とし
て、メタルラス加工前の金属板の板厚の１．２〜３倍の
板厚を有する平板状のメタルラス板を交互に逆方向に折
り曲げて階段状または波板状に成形したメタルラス板を
用いたことを特徴とする排ガス浄化用触媒構造体。(2) In a catalyst structure in which a large number of flat plate-like catalysts are alternately bent in opposite directions to form a step-like or corrugated-like mesh and stacked one on top of another, a metal lath processing is used as the mesh. A metal lath plate formed by forming a step-like or corrugated plate by alternately bending a flat metal lath plate having a thickness of 1.2 to 3 times the thickness of the previous metal plate in the opposite direction. Exhaust gas purifying catalyst structure.
【０００９】（３）前記メタルラス板の表面が、触媒成
分で被覆されていることを特徴とする上記（１）または
（２）に記載の排ガス浄化用触媒構造体。 （４）前記触媒成分で被覆する前のメタルラス板の表面
が、あらかじめシリカゾル、ポリビニルアルコールまた
はこれらの複合体で被覆されていることを特徴とする上
記（３）に記載の排ガス浄化用触媒構造体。(3) The exhaust gas purifying catalyst structure according to the above (1) or (2), wherein the surface of the metal lath plate is coated with a catalyst component. (4) The exhaust gas purifying catalyst structure according to (3), wherein the surface of the metal lath plate before being coated with the catalyst component is previously coated with silica sol, polyvinyl alcohol, or a composite thereof. .
【００１０】（５）前記板状触媒が、メタルラス板また
は無機結合剤で強化されたガラス製織布からなる基材に
酸化チタンと、バナジウム、モリブデンおよびタングス
テンのうち少なくとも一つの酸化物を主成分とする触媒
成分を前記基材の網目を埋めるように担持させた触媒で
あって、前記網状物としてのメタルラス板の表面に被覆
される触媒成分が、前記板状触媒の触媒成分と同様の成
分を有するものであることを特徴とする上記（３）また
は（４）に記載の排ガス浄化用触媒構造体。(5) The plate-like catalyst is composed of a metal lath plate or a base material made of glass woven fabric reinforced with an inorganic binder, wherein titanium oxide and at least one oxide selected from vanadium, molybdenum and tungsten are used as main components. A catalyst component to be supported so as to fill the mesh of the substrate, wherein the catalyst component coated on the surface of the metal lath plate as the mesh is a component similar to the catalyst component of the plate catalyst The exhaust gas purifying catalyst structure according to the above (3) or (4), characterized by having:
【００１１】（６）平板状の触媒または該平板状の触媒
を交互に逆方向に折り曲げて階段状または波板状に成形
した板状触媒を、平板状の網状物を交互に逆方向に折り
曲げて階段状または波板状に成形した網状物または前記
平板状の網状物を介して多数積層した触媒構造体の前記
網状物であって、メタルラス加工前の金属板の板厚の
１．２〜３倍の板厚を有する平板状のメタルラス板また
は該平板状のメタルラス板を交互に逆方向に折り曲げて
階段状または波板状に成形したメタルラス板からなるこ
とを特徴とする触媒構造体用網状物。(6) A plate-like catalyst or a plate-like catalyst formed by bending the plate-like catalyst alternately in the opposite direction to form a step-like or corrugated plate, and alternately folding a plate-like mesh in the opposite direction. And a mesh structure formed in a step-like or corrugated shape or a mesh structure of a catalyst structure laminated in large numbers via the flat-plate mesh material, wherein the metal plate before metal lath processing has a thickness of 1.2 to 1.2. A mesh for a catalyst structure, comprising a flat metal lath plate having a thickness of three times or a metal lath plate formed by bending the flat metal lath plate alternately in the opposite direction to form a stepped or corrugated plate. object.
【００１２】（７）前記メタルラス板の表面が、触媒成
分で被覆されていることを特徴とする上記（６）に記載
の触媒構造体用網状物。 （８）前記触媒成分で被覆する前のメタルラス板の表面
が、あらかじめシリカゾル、ポリビニルアルコールまた
はこれらの複合体で被覆されていることを特徴とする上
記（７）に記載の触媒構造体用網状物。(7) The mesh for a catalyst structure according to the above (6), wherein the surface of the metal lath plate is coated with a catalyst component. (8) The mesh for a catalyst structure according to (7), wherein the surface of the metal lath plate before being coated with the catalyst component is previously coated with silica sol, polyvinyl alcohol, or a composite thereof. .
【００１３】[0013]
【発明の実施の形態】次に本発明を図面を用いて詳細に
説明する。図１は、本発明の触媒構造体に適用する、網
状物としてのメタルラス板の平面図およびそのＡ−Ａ線
矢視方向断面を示す説明図である。図において、このメ
タルラス板の板厚ｔは、メタルラス加工（薄金属板に、
短い切り込みを千鳥配置に与え、この切り込みに対して
直角方向に引っ張り力を加えて網目状の薄金属板を成形
する工程）前の元の金属基材の板厚Ｔの１．２〜３倍と
したものである。このようなメタルラス板を介して板状
触媒を多数積層した場合の前記メタルラス板近傍をガス
が流通する状態を図３に示す。図３において、このメタ
ルラス板２はダスト粒子６の流れる方向に表裏の差が小
さく、しかも板厚が薄くなっているので、ダスト濃度の
高いガスを流した場合であっても、表裏何れからのダス
ト粒子も目開き部周辺の金属部に付着しにくい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a metal lath plate as a mesh applied to the catalyst structure of the present invention, and an explanatory diagram showing a cross section in the direction of arrows AA. In the figure, the thickness t of this metal lath plate is determined by metal lath processing (for thin metal plate,
A step of forming short cuts in a staggered arrangement and applying a tensile force in a direction perpendicular to the cuts to form a mesh-like thin metal plate) 1.2 to 3 times the thickness T of the original metal base material before It is what it was. FIG. 3 shows a state in which gas flows near the metal lath plate when a large number of plate-like catalysts are stacked via such a metal lath plate. In FIG. 3, the metal lath plate 2 has a small difference between the front and back sides in the direction in which the dust particles 6 flow, and has a small plate thickness. Dust particles are also less likely to adhere to metal parts around the openings.
【００１４】また、例えダスト粒子が目開き部に付着し
た場合であっても、図４に示したように、板厚が薄いの
で、従来のメタルラス板（図１０、１２参照）に較べて
堆積ダスト４が脱落し易いので、目開き部が閉塞するこ
とはない。Further, even if dust particles adhere to the openings, as shown in FIG. 4, since the plate thickness is small, the dust particles are deposited as compared with a conventional metal lath plate (see FIGS. 10 and 12). Since the dust 4 easily falls off, the openings do not close.
【００１５】本発明において、メタルラス板の板厚を元
の金属基材の板厚の１．２〜３倍にする方法としては、
例えばローラ掛けまたはプレス等による圧延方法があげ
られるが、特に限定されるものではない。なお、板厚調
整後のメタルラス板の板厚ｔ（図１参照）は、メタルラ
ス板の元の基材の板厚Ｔ（図１０参照）に等しければダ
ストの堆積防止の点でより好ましいが、強度が低くなり
すぎて実用的でない。またメタルラス板の刻み幅Ｗ（図
１０参照）が大きい場合は、圧延の過程で元の基材の形
状のように目開き部を塞ぐ形になるため、ダストは堆積
しない。換言すれば、メタルラス板の刻み幅Ｗの小さな
ラスを圧延する時は、ラスは目開きを保ったまま、その
場でねじれることによって板厚が薄くなるのに対し、Ｗ
の大きなラスを圧延する時は、その場で（無理に）ねじ
れるのではなく、むしろ元の平板の形に近づく。つま
り、Ｗの大きなラスの場合も、圧延でラスが（無理に）
平板化されて形が歪んだり切断したりすることは無く、
元の平板に近づいていく。ではラスの方向性は残ったま
まだからダストは詰まるのかと言うと、Ｗが大きくてｔ
／Ｔが１．２〜３のラスであれば目開き部は圧延によっ
て大部分が塞がれているはずなので、ダストは堆積する
ことができない。即ち、本発明はメタルラス板の刻み幅
Ｗが大きい場合も十分カバーすることができるのであ
る。In the present invention, as a method for making the thickness of the metal lath plate 1.2 to 3 times the thickness of the original metal substrate,
For example, a rolling method using a roller or a press may be used, but is not particularly limited. The thickness t (see FIG. 1) of the metal lath plate after the adjustment of the thickness is more preferably equal to the thickness T (see FIG. 10) of the original base material of the metal lath plate in terms of preventing dust accumulation. The strength is too low to be practical. When the step width W (see FIG. 10) of the metal lath plate is large, dust does not accumulate in the rolling process because the opening is closed like the shape of the original base material. In other words, when rolling a lath with a small step width W of a metal lath plate, the lath is twisted on the spot while keeping the aperture, while the plate thickness becomes thinner.
When rolling large laths, they do not twist (force) in place, but rather approach the shape of the original plate. In other words, even in the case of a lath with a large W, the lath is rolled (forcibly).
It is not flattened and the shape is not distorted or cut,
It approaches the original plate. Then, because the direction of the lath remains, dust is clogged.
If / T is 1.2 to 3 laths, the apertures should be largely closed by rolling, so that dust cannot accumulate. That is, the present invention can sufficiently cover the case where the step width W of the metal lath plate is large.
【００１６】本発明において、メタルラス板を調製する
元の金属基材としては、例えば板厚０．１〜０．８ｍｍ
の鋼板が使用されるが、０．１〜０．３ｍｍの鋼板が好
適に使用される。In the present invention, the metal substrate from which the metal lath plate is prepared is, for example, 0.1 to 0.8 mm in thickness.
The steel plate of 0.1 to 0.3 mm is preferably used.
【００１７】本発明において、板厚調整後のメタルラス
板の表面を触媒成分で被覆することが好ましい。また触
媒成分で被覆する前の表面を、あらかじめシリカゾル、
ポリビニルアルコールまたはこれらの複合物からなる強
化液で被覆して強化しておくこともできる。これによっ
て、強度が向上し、単位体積当たりの触媒量が増加して
触媒反応が促進するだけでなく、図２に示したように、
ダストの堆積し易い鋭角部が覆われるので、ダスト堆積
防止効果が増大する。上記強化液による被覆をしない
で、板厚調整後のメタルラス板に直接触媒成分を担持さ
せてもよい。触媒成分としては、積層する板状触媒の触
媒成分と同様のものが好適に使用される。In the present invention, it is preferable that the surface of the metal lath plate after the thickness adjustment is coated with a catalyst component. In addition, the surface before coating with the catalyst component, silica sol,
It can also be reinforced by coating with a reinforcing liquid comprising polyvinyl alcohol or a composite thereof. This not only enhances the strength and increases the amount of catalyst per unit volume to promote the catalytic reaction, but also, as shown in FIG.
Since the sharp corner where dust easily accumulates is covered, the effect of preventing dust accumulation increases. The catalyst component may be directly supported on the metal lath plate after the thickness adjustment without coating with the reinforcing liquid. As the catalyst component, the same one as the catalyst component of the plate catalyst to be laminated is suitably used.
【００１８】本発明において、触媒構造体を構成する板
状触媒としては、例えば酸化チタンを主成分とし、バナ
ジウム、モリブデンおよびタングステンのうち少なくと
も一つの酸化物を含む活性成分を添加した触媒成分を、
メタルラス板、無機繊維製織布等の基材に、その網目を
埋めるように塗布、圧着した後、階段状、波板状等各種
の形状に成形した板状触媒が使用される。なお、この板
状触媒体を得るために、触媒成分に無機繊維、結合剤等
を添加するなどの周知手段を併用することもできる。In the present invention, the plate-like catalyst constituting the catalyst structure includes, for example, a catalyst component containing titanium oxide as a main component and an active component containing at least one oxide of vanadium, molybdenum and tungsten.
A plate-like catalyst which is applied to a base material such as a metal lath plate or a woven fabric made of inorganic fibers so as to fill the mesh and pressed, and then formed into various shapes such as a step-like shape and a corrugated shape is used. In addition, in order to obtain the plate-like catalyst body, well-known means such as addition of inorganic fibers, a binder and the like to the catalyst component can be used in combination.
【００１９】本発明において、板状触媒とメタルラス板
を交互に積層する際、図５に示すように、平板状の触媒
を交互に逆方向に折り曲げて階段状または波板状に成形
した板状触媒１と平板状のメタルラス板２を交互に積層
してもよく（図５ａ、ｃ）、また平板状の板状触媒１
と、平板状のメタルラス板を交互に逆方向に折り曲げて
階段状または波板状に成形したメタルラス板２とを交互
に積層してもよい（図５ｂ、ｄ）。板状触媒１またはメ
タルラス板２の断面形状としては、例えば図６（ａ〜
ｆ）に示すように、階段状、波板状、コの字状、平板状
等各種の形状が挙げられる。In the present invention, when the plate-like catalyst and the metal lath plate are alternately laminated, as shown in FIG. 5, the plate-like catalyst is bent alternately in the opposite direction to form a step-like or corrugated plate-like catalyst. The catalyst 1 and the flat metal lath plate 2 may be alternately laminated (FIGS. 5A and 5C).
And a metal lath plate 2 formed in a stepped or corrugated shape by alternately bending a flat metal lath plate in the opposite direction (FIGS. 5B and 5D). The cross-sectional shape of the plate-like catalyst 1 or the metal lath plate 2 is, for example, as shown in FIG.
As shown in f), various shapes such as a step shape, a corrugated plate shape, a U-shape, and a flat plate shape are exemplified.
【００２０】[0020]
【実施例】次に、本発明の具体的実施例を説明する。 実施例１ 比表面積２７０ｍ2 ／ｇの酸化チタン１．２ｋｇにモリ
ブデン酸アンモニウム（（ＮＨ4 ）6 ・Ｍｏ7 Ｏ24・４
Ｈ2 Ｏ）を０．２５ｋｇ、メタバナジン酸アンモニウム
０．２３ｋｇおよび蓚酸０．３ｋｇ、さらに２０ｗｔ％
のシリカゾルをＳｉＯ2 として８ｗｔ％添加し、水を加
えながら混練してペースト状態にし、これにカオリン系
無機繊維（商品名：カオウール）１５ｗｔ％を加えてさ
らに混練し、水分３０．５％のペーストを得た。Next, specific examples of the present invention will be described. Titanium oxide 1.2kg of ammonium molybdate in Example 1 specific surface area 270m 2 / g ((NH 4 ) 6 · Mo 7 O 24 · 4
H 2 O) and 0.25 kg, ammonium metavanadate 0.23kg and oxalic 0.3 kg, further 20 wt%
Is added as 8 wt% as SiO 2 , kneaded while adding water to form a paste, and 15 wt% of kaolin-based inorganic fiber (trade name: kao wool) is added thereto and further kneaded to obtain a paste having a water content of 30.5%. I got
【００２１】この触媒ペーストを、幅５００ｍｍ、板厚
０．６７ｍｍ、開孔率７４．０％で、図７に示したメタ
ルラス形状におけるｃおよびｄが、それぞれ１．１５ｍ
ｍ、３．００ｍｍのメタルラス板に、一対の圧延ローラ
を用い目開き部および基材表面に塗布して厚み０．６８
ｍｍの板状触媒体を得た。この板状触媒を図８における
平面部の長さａ、段差部の長さｂおよび板状触媒の高さ
ｈがそれぞれ１４．５ｍｍ、３．５ｍｍおよび２．９ｍ
ｍとなるように金型の間に挟んで成形し、断面形状が上
記図６（ａ）の断面となるように成形したのち、５００
℃で２時間焼成して板状触媒とした。This catalyst paste was 500 mm wide, 0.67 mm thick, and 74.0% porosity, and c and d in the metal lath shape shown in FIG.
m, a metal lath plate having a thickness of 0.68 mm using a pair of rolling rollers on the opening and the surface of the substrate.
mm plate-like catalyst body was obtained. The length a of the plane portion, the length b of the step portion, and the height h of the plate catalyst in FIG. 8 are 14.5 mm, 3.5 mm and 2.9 m, respectively.
m, and molded so that the cross-sectional shape becomes the cross-section shown in FIG.
Calcination was performed at 2 ° C. for 2 hours to obtain a plate catalyst.
【００２２】一方、比表面積約２７０ｍ2 ／ｇの酸化チ
タン１．２ｋｇにモリブデン酸アンモニウム（（Ｎ
Ｈ4 ）6 ・Ｍｏ7 Ｏ24・４Ｈ2 Ｏ）を０．２５ｋｇ、メ
タバナジン酸アンモニウム０．２３ｋｇおよび蓚酸０．
３ｋｇに水を加えて混練して粘土状にしたのち、押出し
造粒機で３φの柱状に成形し、乾燥したのち５５０℃で
２時間焼成し、その後、微粉砕器で粉砕して１μｍ以下
の粒子が６０％以上の触媒粉末を得た。この粉末に水を
加えて固形分４０％の触媒スラリを調整した。On the other hand, 1.2 kg of titanium oxide having a specific surface area of about 270 m 2 / g was added to ammonium molybdate ((N
H 4) 6 · Mo 7 O 24 · 4H 2 O) and 0.25 kg, ammonium metavanadate 0.23kg and oxalic 0.
After adding water to 3 kg and kneading to form a clay, it is formed into a 3φ column by an extrusion granulator, dried, and calcined at 550 ° C. for 2 hours, and then pulverized with a fine pulverizer to 1 μm or less. A catalyst powder having particles of 60% or more was obtained. Water was added to the powder to prepare a catalyst slurry having a solid content of 40%.
【００２３】他方、板厚０．２０ｍｍの鋼板をメタルラ
ス加工して幅５００ｍｍ、板厚０．６４ｍｍ、開孔率８
１．１％で、図７に示した目開き形状におけるｃおよび
ｄがそれぞれ１．６５ｍｍ、３．６０ｍｍの脱脂済みメ
タルラス板を得、これを板厚０．４５ｍｍになるように
プレスし、目開き部が塞がらないように上記触媒スラリ
をコーティングし、３５０℃で２時間焼成して平板状の
メタルラス板（図１参照）を得た。得られたメタルラス
板（網状物）と上記板状触媒とを図５（ａ）に示したよ
うに交互に積層して実施例１の触媒構造体とした。On the other hand, a steel plate having a thickness of 0.20 mm is subjected to metal lath processing to have a width of 500 mm, a thickness of 0.64 mm, and a porosity of 8 mm.
At 1.1%, degreased metal lath plates having c and d of 1.65 mm and 3.60 mm, respectively, in the aperture shape shown in FIG. 7 were pressed and pressed to a plate thickness of 0.45 mm. The above-mentioned catalyst slurry was coated so as not to block the opening, and calcined at 350 ° C. for 2 hours to obtain a flat metal lath plate (see FIG. 1). The obtained metal lath plate (net-like material) and the above plate-like catalyst were alternately laminated as shown in FIG. 5A to obtain a catalyst structure of Example 1.
【００２４】実施例２ 前記脱脂済みメタルラス板を、プレスにより板厚を０．
４５ｍｍに調整したものを、触媒スラリをコーティング
することなくそのまま網状物として用いた以外は、上記
実施例１と同様にして実施例２の触媒構造体とした。Example 2 The degreased metal lath plate was pressed to a thickness of 0.
A catalyst structure of Example 2 was prepared in the same manner as in Example 1 except that the material adjusted to 45 mm was used as a mesh without coating the catalyst slurry.
【００２５】実施例３ 前記脱脂済みメタルラス板の板厚をプレスにより０．２
５ｍｍに調整したのち、同様の触媒スラリを担持させた
メタルラス板を網状物として用いた以外は、上記実施例
１と同様にして実施例３の触媒構造体とした。Example 3 The thickness of the degreased metal lath plate was set to 0.2 by pressing.
After adjusting to 5 mm, a catalyst structure of Example 3 was obtained in the same manner as in Example 1 except that a metal lath plate supporting the same catalyst slurry was used as a mesh.
【００２６】比較例１ 前記脱脂済みのメタルラス板をプレスすることなくその
まま用い（図２参照）、これに同様の触媒スラリをコー
ティングしたメタルラス板を網状物として用いた以外は
上記実施例１と同様にして比較例１の触媒構造体とし
た。Comparative Example 1 Same as Example 1 except that the degreased metal lath plate was used without being pressed (see FIG. 2), and a metal lath plate coated with the same catalyst slurry was used as a mesh. The catalyst structure of Comparative Example 1 was obtained.
【００２７】比較例２ 板厚０．２ｍｍの鋼板を同様にメタルラス加工して厚さ
０．８５ｍｍのメタルラス板を得、これに同様の触媒ス
ラリを担持したものを網状物として用いた以外は上記実
施例１と同様にして比較例２の触媒構造体とした。COMPARATIVE EXAMPLE 2 A steel plate having a thickness of 0.2 mm was similarly subjected to metal lath processing to obtain a metal lath plate having a thickness of 0.85 mm, and the same catalyst slurry supported thereon was used as a mesh material. In the same manner as in Example 1, a catalyst structure of Comparative Example 2 was obtained.
【００２８】実施例４ 重合度４３〜４８、分子量１２４のポリビニルアルコー
ル（ＰＶＡ１２４）５ｇを水９０ｇに加熱溶解させて得
られた溶液と、ＳｉＯ2 分２０ｗｔ％のシリカゾルとチ
タニア粉末とを、質量比９５：９５：１１０で混合して
含浸剤とし、この含浸剤を、前記脱脂済みのメタルラス
板をプレスして板厚を０．３５ｍｍに調整したメタルラ
ス板に含浸させ、風圧によりメタルラス板の目開き部を
開け、１日風乾したのち、１５０℃で２時間焼成した。
この含浸剤コーティングメタルラス板を網状物として用
いた以外は上記実施例１と同様にして実施例４の触媒構
造体を得た。Example 4 A solution obtained by heating and dissolving 5 g of polyvinyl alcohol (PVA124) having a degree of polymerization of 43 to 48 and a molecular weight of 124 in 90 g of water, a silica sol having a SiO 2 content of 20 wt%, and a titania powder were prepared by mass ratio. The impregnating agent was mixed at a ratio of 95: 95: 110, and the impregnating agent was impregnated into a metal lath plate whose thickness was adjusted to 0.35 mm by pressing the degreased metal lath plate, and the metal lath plate was opened by wind pressure. The part was opened, air-dried for one day, and then fired at 150 ° C. for 2 hours.
A catalyst structure of Example 4 was obtained in the same manner as in Example 1 except that this impregnant-coated metal lath plate was used as a mesh.
【００２９】実施例１〜４および比較例１、２で得られ
た幅１００ｍｍ×高さ５０ｍｍ×長さ２５０ｍｍの触媒
構造体について、図９に示す装置により、ダスト粒子６
として平均粒径１０μｍのグラファイトを、排ガス５と
して空気をそれぞれ用い、前記グラファイトを含有する
空気を、常温、ＳＶ：４５０００（ｈ-1）、空塔速度
３．４（ｍ／ｓｅｃ）、グラファイト流量３（ｇ／ｍｉ
ｎ）で供試触媒構造体に６時間流通させ、流通前後のメ
タルラス板（網状物）の単位面積当たりの重量変化量を
求めたところ、比較例２の変化量を１とした場合、実施
例１の変化量は０．３０７、実施例２の変化量は０．３
５８、実施例３の変化量は０．０７５、実施例４の変化
量は０．１１３、比較例１の変化量は０．７７４であっ
た。With respect to the catalyst structures having a width of 100 mm, a height of 50 mm and a length of 250 mm obtained in Examples 1 to 4 and Comparative Examples 1 and 2, dust particles 6 were obtained by the apparatus shown in FIG.
The graphite-containing air was used at room temperature, SV: 45000 (h -1 ), the superficial velocity 3.4 (m / sec), and the graphite flow rate. 3 (g / mi
In n), the sample was allowed to flow through the test catalyst structure for 6 hours, and the weight change per unit area of the metal lath plate (net-like material) before and after the flow was determined. 1 was 0.307, and Example 2 was 0.3.
58, the variation in Example 3 was 0.075, the variation in Example 4 was 0.113, and the variation in Comparative Example 1 was 0.774.
【００３０】実験結果を、網状物としてのメタルラス板
の物性と共に表１に示した。また、メタルラス板厚／基
材板厚と質量変化量の相対値との関係を図１３に示し
た。The experimental results are shown in Table 1 together with the physical properties of the metal lath plate as a mesh. FIG. 13 shows the relationship between the metal lath plate thickness / base plate thickness and the relative value of the amount of change in mass.
【００３１】[0031]
【表１】 表１において、実施例１、３および比較例１、２から、
メタルラス板の板厚が薄くなるに伴って目開き部へのグ
ラファイトの堆積量が減少していることが分かる。この
ことから、メタルラスを圧延してその厚さを薄くするこ
とはダストの堆積防止に有効であることが分かる。ま
た、図１３からメタルラス板厚（ｔ）／基材板厚（Ｔ）
の比（ｔ／Ｔ）は１．２〜３が好ましいことが分かる。[Table 1] In Table 1, from Examples 1 and 3 and Comparative Examples 1 and 2,
It can be seen that as the thickness of the metal lath plate decreases, the amount of graphite deposited on the openings decreases. From this, it can be seen that rolling the metal lath to reduce its thickness is effective for preventing dust accumulation. Also, from FIG. 13, the metal lath plate thickness (t) / base plate thickness (T)
It is understood that the ratio (t / T) is preferably 1.2 to 3.
【００３２】実施例１および２から、メタルラス板の鋭
角部を触媒スラリで覆った触媒構造体の方がグラファイ
トの堆積量が少なくなっており、メタルラス板表面を触
媒スラリまたは含浸剤（強化剤）でコーティングするこ
とはダスト堆積防止に効果的であることが分かる。According to Examples 1 and 2, the catalyst structure in which the sharp portion of the metal lath plate is covered with the catalyst slurry has a smaller graphite deposition amount, and the surface of the metal lath plate has the catalyst slurry or the impregnating agent (strengthening agent). It can be seen that coating with is effective in preventing dust accumulation.
【００３３】[0033]
【発明の効果】本願の請求項１に記載の発明によれば、
板状触媒相互間に配置される網状物としてのメタルラス
板へのダストの堆積を回避することができるので、油焚
き、石炭焚き等高濃度ダストを含む排ガス処理に適用し
てもダストの堆積または閉塞に起因する触媒活性の低下
を防止することができる。本願の請求項２記載の発明に
よれば、上記発明と同様の効果が得られる。本願の請求
項３に記載の発明によれば、上記発明の効果に加え、単
位体積当たりの触媒量が増加するだけでなく、メタルラ
ス板の鋭角部が減少することによりダストの堆積防止効
果が向上する。本願の請求項４に記載の発明によれば、
上記請求項３に記載の発明と同様、メタルラス板の鋭角
部が減少することによりダストの堆積防止効果が向上す
る。According to the invention described in claim 1 of the present application,
It is possible to avoid the accumulation of dust on the metal lath plate as a mesh placed between the plate-shaped catalysts. Therefore, even when applied to exhaust gas treatment including high-concentration dust such as oil-fired and coal-fired, the accumulation of dust or It is possible to prevent a decrease in catalytic activity due to the blockage. According to the invention described in claim 2 of the present application, the same effect as the above invention can be obtained. According to the invention described in claim 3 of the present application, in addition to the effect of the above invention, not only the amount of catalyst per unit volume is increased, but also the effect of preventing dust accumulation is improved by reducing the sharp corners of the metal lath plate. I do. According to the invention described in claim 4 of the present application,
As in the third aspect of the present invention, the effect of preventing the accumulation of dust is improved by reducing the acute angle portion of the metal lath plate.
【００３４】本願の請求項５に記載の発明によれば、ダ
ストの堆積抑制効果を有する脱硝用触媒構造体が得られ
る。本願の請求項６に記載の発明によれば、ダストが堆
積し難い、触媒構造体用の網状物が得られる。本願の請
求項７に記載の発明によれば、上記発明の効果に加え、
ダストの堆積防止効果がより向上する。本願の請求項８
に記載の発明によれば、上記発明と同様、ダストの堆積
防止効果がより向上する。According to the invention described in claim 5 of the present application, a denitration catalyst structure having an effect of suppressing dust accumulation can be obtained. According to the invention described in claim 6 of the present application, it is possible to obtain a reticulated material for a catalyst structure, in which dust hardly accumulates. According to the invention described in claim 7 of the present application, in addition to the effects of the above invention,
The effect of preventing dust accumulation is further improved. Claim 8 of the present application
According to the invention described in (1), similarly to the above invention, the effect of preventing dust accumulation is further improved.
【図１】本発明に適用するメタルラス板の平面および断
面を示す説明図。FIG. 1 is an explanatory view showing a plane and a cross section of a metal lath plate applied to the present invention.
【図２】本発明に適用する別のメタルラス板の平面およ
び断面を示す説明図。FIG. 2 is an explanatory view showing a plane and a cross section of another metal lath plate applied to the present invention.
【図３】本発明におけるメタルラス板近傍を流れるダス
ト粒子の軌道を示す説明図。FIG. 3 is an explanatory diagram showing a trajectory of dust particles flowing near a metal lath plate in the present invention.
【図４】本発明におけるメタルラス板へのダストの閉塞
状態を示す説明図。FIG. 4 is an explanatory view showing a state in which dust is blocked on a metal lath plate in the present invention.
【図５】板状触媒とメタルラス板との積層例を示す説明
図。FIG. 5 is an explanatory view showing an example of lamination of a plate catalyst and a metal lath plate.
【図６】板状触媒またはメタルラス板の断面形状の一例
を示す説明図。FIG. 6 is an explanatory view showing an example of a cross-sectional shape of a plate-like catalyst or a metal lath plate.
【図７】メタルラスの目開き部の形状の寸法を示す図。FIG. 7 is a diagram showing the dimensions of the shape of the aperture of the metal lath.
【図８】板状触媒の断面形状を示す説明図。FIG. 8 is an explanatory view showing a cross-sectional shape of a plate catalyst.
【図９】ダスト堆積試験に用いる装置の説明図。FIG. 9 is an explanatory view of an apparatus used for a dust deposition test.
【図１０】従来技術におけるメタルラス板の平面および
断面を示す説明図。FIG. 10 is an explanatory view showing a plane and a cross section of a metal lath plate in a conventional technique.
【図１１】従来技術におけるメタルラス板近傍を流れる
ダスト粒子の軌道を示す図。FIG. 11 is a diagram showing a trajectory of dust particles flowing near a metal lath plate in a conventional technique.
【図１２】従来技術におけるメタルラス板へのダストの
閉塞状態を示す説明図。FIG. 12 is an explanatory view showing a state in which dust is blocked on a metal lath plate in a conventional technique.
【図１３】本発明の実施例における、メタルラス板厚／
基材板厚（ｔ／Ｔ）と質量変化量との関係を示す図。FIG. 13 shows a metal lath plate thickness /
The figure which shows the relationship between a base material plate thickness (t / T) and the amount of mass change.
１…板状触媒、２…メタルラス板（網状物）、３…触媒
構造体、４…堆積ダスト、５…排ガス、６…ダスト粒子
（の流れ）、７…メタルラス板に担持された強化剤また
は触媒成分。DESCRIPTION OF SYMBOLS 1 ... Plate catalyst, 2 ... Metal lath plate (net), 3 ... Catalyst structure, 4 ... Deposited dust, 5 ... Exhaust gas, 6 ... Dust particles (flow), 7 ... Reinforcing agent carried on the metal lath plate or Catalyst component.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｄ 53/36 Ｃ (72)発明者 横山 公一 広島県呉市宝町３番36号 バブコック日立 株式会社呉研究所内 Ｆターム(参考） 4D048 AA06 BA07X BA07Y BA23Y BA26X BA26Y BA27Y BA39X BA39Y BA41X BA41Y BB07 BB11 BB18 4G069 AA01 AA03 AA08 AA09 AA11 BA04A BA04B BA14A BA14B BA17 BC50A BC50B BC54A BC59A BC59B BC60A CA03 CA13 EA12 EA21 EB11 EB15X EB15Y EE01 EE06 FA03 FC05 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B01D 53/36 C (72) Inventor Koichi Yokoyama 3-36 Takaracho, Kure City, Hiroshima Babcock-Hitachi Kure Co., Ltd. F-term in the laboratory (reference) 4D048 AA06 BA07X BA07Y BA23Y BA26X BA26Y BA27Y BA39X BA39Y BA41X BA41Y BB07 BB11 BB18 4G069 AA01 AA03 AA08 AA09 AA11 BA04A BA04B BA14A BA14B BA17 BC15 EB13 EB13 BC15 EB18 BC50 EB18 BC50A
Claims (8)
て階段状または波板状に成形した板状触媒を、平板状の
網状物を介して多数積層した触媒構造体において、前記
網状物としてメタルラス板を用い、該メタルラス板の板
厚を、メタルラス加工前の金属板の板厚の１．２〜３倍
としたことを特徴とする排ガス浄化用触媒構造体。1. A catalyst structure in which a large number of plate-like catalysts formed by folding a plate-like catalyst alternately in the opposite direction to form a stepped or corrugated shape via a plate-like mesh are laminated. An exhaust gas purifying catalyst structure, characterized in that a metal lath plate is used as the metal plate, and the thickness of the metal lath plate is 1.2 to 3 times the thickness of the metal plate before metal lath processing.
り曲げて階段状または波板状に成形した網状物を介して
多数積層した触媒構造体において、前記網状物として、
メタルラス加工前の金属板の板厚の１．２〜３倍の板厚
を有する平板状のメタルラス板を交互に逆方向に折り曲
げて階段状または波板状に成形したメタルラス板を用い
たことを特徴とする排ガス浄化用触媒構造体。2. A catalyst structure in which a large number of flat plate-shaped catalysts are alternately bent in the opposite direction to form a step-like or corrugated plate-like net-like structure,
The use of a metal lath plate formed by bending a flat metal lath plate having a thickness of 1.2 to 3 times the thickness of the metal plate before metal lath processing alternately in the opposite direction to form a stepped or corrugated plate. Characteristic catalyst structure for exhaust gas purification.
被覆されていることを特徴とする請求項１または２に記
載の排ガス浄化用触媒構造体。3. The exhaust gas purifying catalyst structure according to claim 1, wherein a surface of the metal lath plate is coated with a catalyst component.
板の表面が、あらかじめシリカゾル、ポリビニルアルコ
ールまたはこれらの複合体で被覆されていることを特徴
とする請求項３に記載の排ガス浄化用触媒構造体。4. The exhaust gas purifying catalyst structure according to claim 3, wherein the surface of the metal lath plate before being coated with the catalyst component is previously coated with silica sol, polyvinyl alcohol or a composite thereof. body.
機結合剤で強化されたガラス製織布からなる基材に酸化
チタンと、バナジウム、モリブデンおよびタングステン
のうち少なくとも一つの酸化物を主成分とする触媒成分
を前記基材の網目を埋めるように担持させた触媒であっ
て、前記網状物としてのメタルラス板の表面に被覆され
る触媒成分が、前記板状触媒の触媒成分と同様の成分を
含有するものであることを特徴とする請求項３または４
に記載の排ガス浄化用触媒構造体。5. A method according to claim 1, wherein the plate-shaped catalyst comprises a metal lath plate or a base material made of a glass woven fabric reinforced with an inorganic binder, and titanium oxide and at least one oxide of vanadium, molybdenum and tungsten as a main component. A catalyst component to be supported so as to fill the mesh of the base material, wherein the catalyst component coated on the surface of the metal lath plate as the mesh is a component similar to the catalyst component of the plate catalyst. 5. The composition according to claim 3, wherein
3. The exhaust gas purifying catalyst structure according to item 1.
互に逆方向に折り曲げて階段状または波板状に成形した
板状触媒を、平板状の網状物を交互に逆方向に折り曲げ
て階段状または波板状に成形した網状物または前記平板
状の網状物を介して多数積層した触媒構造体の前記網状
物であって、メタルラス加工前の金属板の板厚の１．２
〜３倍の板厚を有する平板状のメタルラス板または該平
板状のメタルラス板を交互に逆方向に折り曲げて階段状
または波板状に成形したメタルラス板からなることを特
徴とする触媒構造体用網状物。6. A plate-like catalyst or a plate-like catalyst formed in a stepwise or corrugated shape by alternately folding the plate-like catalyst in the opposite direction, and alternately folding a plate-like mesh in the opposite direction. A mesh structure formed in a step-like or corrugated shape or a mesh structure of a catalyst structure formed by laminating a large number of the catalyst structures via the plate-like mesh material, wherein the thickness of the metal plate before metal lath processing is 1.2
A catalyst structure comprising a flat metal lath plate having a thickness of up to three times or a metal lath plate formed by alternately bending the flat metal lath plate in the opposite direction to form a stepped or corrugated plate. Reticulated material.
被覆されていることを特徴とする請求項６に記載の触媒
構造体用網状物。7. The mesh for a catalyst structure according to claim 6, wherein a surface of the metal lath plate is coated with a catalyst component.
板の表面が、あらかじめシリカゾル、ポリビニルアルコ
ールまたはこれらの複合体で被覆されていることを特徴
とする請求項７に記載の触媒構造体用網状物。8. The mesh for a catalyst structure according to claim 7, wherein the surface of the metal lath plate before being coated with the catalyst component is previously coated with silica sol, polyvinyl alcohol or a composite thereof. object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000069010A JP2001252574A (en) | 2000-03-13 | 2000-03-13 | Catalyst structure for cleaning exhaust gas and reticulated material used for this |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000069010A JP2001252574A (en) | 2000-03-13 | 2000-03-13 | Catalyst structure for cleaning exhaust gas and reticulated material used for this |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001252574A true JP2001252574A (en) | 2001-09-18 |
Family
ID=18587974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000069010A Pending JP2001252574A (en) | 2000-03-13 | 2000-03-13 | Catalyst structure for cleaning exhaust gas and reticulated material used for this |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001252574A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005051517A1 (en) * | 2003-11-25 | 2005-06-09 | Babcock-Hitachi Kabushiki Kaisha | Filter for exhaust gas from diesel engine |
| JP2008136968A (en) * | 2006-12-04 | 2008-06-19 | Babcock Hitachi Kk | Method of manufacturing plate-like nox removal catalyst as well as metal substrate for catalyst |
| US7772147B2 (en) | 2004-09-13 | 2010-08-10 | Johnson Matthey Public Limited Company | Catalyst carrier substrate coated with washcoat comprising fibrous material |
| JP2014030791A (en) * | 2012-08-03 | 2014-02-20 | Babcock-Hitachi Co Ltd | Tabular catalyst structure for purifying exhaust gas |
-
2000
- 2000-03-13 JP JP2000069010A patent/JP2001252574A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005051517A1 (en) * | 2003-11-25 | 2005-06-09 | Babcock-Hitachi Kabushiki Kaisha | Filter for exhaust gas from diesel engine |
| JPWO2005051517A1 (en) * | 2003-11-25 | 2007-12-06 | バブコック日立株式会社 | Diesel engine exhaust gas particulate filter, exhaust gas treatment method and apparatus |
| CN100571840C (en) * | 2003-11-25 | 2009-12-23 | 巴布考克日立株式会社 | The filter and the equipment thereof that are used for diesel exhaust |
| US7824635B2 (en) | 2003-11-25 | 2010-11-02 | Babcock-Hitachi Kabushiki Kaisha | Filter for exhaust gas from diesel engine and equipment |
| JP4607769B2 (en) * | 2003-11-25 | 2011-01-05 | バブコック日立株式会社 | Diesel engine exhaust gas particulate matter removal filter, exhaust gas treatment method and apparatus |
| US7772147B2 (en) | 2004-09-13 | 2010-08-10 | Johnson Matthey Public Limited Company | Catalyst carrier substrate coated with washcoat comprising fibrous material |
| JP2008136968A (en) * | 2006-12-04 | 2008-06-19 | Babcock Hitachi Kk | Method of manufacturing plate-like nox removal catalyst as well as metal substrate for catalyst |
| JP2014030791A (en) * | 2012-08-03 | 2014-02-20 | Babcock-Hitachi Co Ltd | Tabular catalyst structure for purifying exhaust gas |
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